//
// DotNetNuke - http://www.dotnetnuke.com
// Copyright (c) 2002-2010
// by Perpetual Motion Interactive Systems Inc. ( http://www.perpetualmotion.ca )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions 
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
//

using System;
using System.Linq;
using System.Web;
using DotNetNuke.Entities.Controllers;

namespace DotNetNuke.HttpModules
{
	public class RewriterUtils
	{
		static internal void RewriteUrl(HttpContext context, string sendToUrl)
		{
			string x = "";
			string y = "";
			RewriteUrl(context, sendToUrl, ref x, ref y);
		}
		static internal void RewriteUrl(HttpContext context, string sendToUrl, ref string sendToUrlLessQString, ref string filePath)
		{
			string queryString = string.Empty;
			sendToUrlLessQString = sendToUrl;
			if ((sendToUrl.IndexOf("?") > 0))
			{
				sendToUrlLessQString = sendToUrl.Substring(0, sendToUrl.IndexOf("?"));
				queryString = sendToUrl.Substring(sendToUrl.IndexOf("?") + 1);
			}
			filePath = string.Empty;
			filePath = context.Server.MapPath(sendToUrlLessQString);
			context.RewritePath(sendToUrlLessQString, string.Empty, queryString);
		}
		static internal string ResolveUrl(string appPath, string url)
		{
			if (String.IsNullOrEmpty(url))
			{
				return url;
			}
			if ((url.StartsWith("~") == false))
			{
				return url;
			}
			if ((url.Length == 1))
			{
				return appPath;
			}
			char seperatorChar = url.ToCharArray()[1];
			if (seperatorChar == '/' || seperatorChar == '\\')
			{
				if ((appPath.Length > 1))
				{
					return appPath + "/" + url.Substring(2);
				}
				else
				{
					return "/" + url.Substring(2);
				}
			}
			else
			{
				if ((appPath.Length > 1))
				{
					return appPath + "/" + url.Substring(1);
				}
				else
				{
					return appPath + url.Substring(1);
				}
			}
		}

		static internal bool OmitFromRewriteProcessing(string localPath)
		{
			string omitSettings = HostController.Instance.GetString("OmitFromRewriteProcessing");
			if (string.IsNullOrEmpty(omitSettings))
			{
				omitSettings = "scriptresource.axd|webresource.axd|gif|ico|jpg|jpeg|png|css|js";
			}
			omitSettings = omitSettings.ToLower();
			localPath = localPath.ToLower();

			string[] omissions = omitSettings.Split(new char[] { '|' });
			return (from s in omissions
					where localPath.EndsWith(s)
					select s).Count() > 0;
		}
	}
}
